# pleurothetism

> English word · Noun

## Definitions
1. A pattern of orientation among most bivalves whereby they come to rest on their left or right sides.

## Etymology
By surface analysis, pleuro- + -thet(ic) + -ism. (Second element from Ancient Greek τίθημι (títhēmi, “I place”).)

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/pleurothetism